A very basic question about shower heads

Is there such a thing as a single shower head that is stationary that combines with a hand-held unit? To clarify -- I want a regular shower head that's attached to the shower wall, but that has a "water diverter" that will enable it to work with an associated hand-held unit. I'm probably not using the right words to describe what I'm looking for. I'm replacing an old shower head that has a single water source. I'd like a new one to be able to work with either of two shower heads, one being stationary, the other being hand-held. Can anyone point me to a make/model of such a product, if it exists? Thanks!!!